JPH11308820A - Assembly method and assembly device for motor stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily improve the efficiency of the assembly work of a stator, while the accuracy of the shape of the stator is effectively maintained. SOLUTION: An inner diameter jig 36 which restrains the inner diameter of stator cores 14 connected to each other annularly and an outer diameter jig 40 which restrains the outer diameter of a cylindrical member 20 are provided. The inner diameter jig 36 has a plurality of 1st jigs 48 which have 1st tapered surfaces 58 on the inside diameter side and can be moved forwards and backwards and a 2nd jig 50 which is provided on the outside diameter side of the 1st jigs 48 and has a 2nd tapered surface 62, by which the 1st tapered surfaces 58 are pushed against to move the 1st jig 48 radially.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for assembling a stator for a motor, in which a plurality of stator cores, each of which is wound with a conducting wire, are integrally press-fitted into the inner periphery of a cylindrical member in a state of being connected to each other. .

[0002]

2. Description of the Related Art Normally, a stator of a motor has a plurality of projections formed radially on an inner peripheral surface of a substantially cylindrical body, and a conductor is wound around grooves of the projections. However, it has been pointed out that the operation of winding the conductor is extremely complicated.

Therefore, for example, Japanese Patent Application Laid-Open No. Hei 7-163070
There is known a stator disclosed in Japanese Unexamined Patent Publication (Kokai) Publication. The stator includes a plurality of stator cores formed as a substantially T-shaped elastic body having a head and a leg, and the stator core has a recess at one end in a circumferential direction of the head, and A convex portion corresponding to the concave portion is formed in the portion, and the convex portion is fitted into a concave portion of another adjacent stator core and connected in an annular shape to form a stator.

[0004] In this stator, after the conductor wire is wound around the leg portion of the stator core, the stator core is connected to the annular shape by fitting the concave portion and the convex portion to each other. Next, the stator core is inserted into the cylindrical body in a state where the stator core is tightened in the axial direction by the holding body, and the fastening force by the holding body is released, so that the stator core expands in diameter and the inner peripheral surface of the cylindrical body. Is pressed against.

[0005]

However, since the stator core itself is an elastic body, when the stator core is press-fitted into a cylindrical member in an annularly connected state, the stator core is deformed and the inner diameter of the stator as a whole is reduced. It has been pointed out that the circularity cannot be maintained. On the other hand, the cylindrical member is also an elastic body, and when the stator core is pressed into the inner periphery of the cylindrical member, the cylindrical member is easily deformed. As a result, there is a problem that the roundness or cylindricity of the stator cannot be maintained at a desired accuracy.

[0006] The present invention solves this kind of problem, and maintains the shape accuracy of the stator effectively,
An object of the present invention is to provide a method and an apparatus for assembling a motor stator, which can easily improve work efficiency.

[0007]

In the method and apparatus for assembling a motor stator according to the present invention, a stator core connected in an annular shape to the outer periphery of an inner diameter jig is arranged.
After the cylindrical member is arranged on the outer periphery of the stator core, the outer diameter jig and the inner diameter jig arranged on the outer periphery of the cylindrical member are moved relatively close to each other. Thereby, while the inner diameter of the stator core is constrained by the inner diameter jig while the outer diameter of the cylindrical member is constrained by the outer diameter jig, the stator core is integrally pressed into the inner periphery of the cylindrical member to obtain a stator. Can be

Therefore, the inner diameter of the stator core and the outer diameter of the cylindrical member are constrained by the inner diameter jig and the outer diameter jig, respectively, and it is ensured that the stator core and the cylindrical member are deformed during the press-fitting operation. Can be blocked. Therefore, in a stator obtained by press-fitting the stator core into the inner periphery of the cylindrical member, roundness and cylindricity are reliably maintained at desired accuracy, and work efficiency is effectively improved.

The inner diameter jig comprises a plurality of first jigs which are set in a ring shape as a whole and are capable of moving back and forth in the radial direction, and a second jig arranged on the inner diameter side of the first jig. Have. Then, the second tape of the second jig is applied to the first tapered surface of the first jig.
While the inner diameter of the stator core is constrained by expanding the outer diameter of the first jig by contacting the tapered surface, the second jig is moved by pressing the stator core into the inner periphery of the cylindrical member, and then moving the second jig. By reducing the outer diameter of the inner diameter jig, the work of taking out the stator is easily and smoothly performed.

[0010]

FIG. 1 is an exploded perspective view of a main part of a motor stator assembling apparatus 10 according to an embodiment of the present invention. FIG. It is a schematic perspective explanatory view.

As shown in FIG. 2, the stator 12 includes a plurality of stator cores 14 arranged in a circumferential direction, and a coil (e.g., a coil) wound around the outer periphery of the stator core 14 via a guide member 16 having a substantially U-shaped cross section. Lead) 18;
A cylindrical member 20 that press-fits the stator core 14 integrally in a state where the stator cores 14 are connected in an annular shape;

The stator core 14 is formed by laminating a predetermined number of plates obtained from an iron-based material having the same shape and elasticity. The stator core 14 includes a head 22 and a leg 2.
4 having a substantially T-shape. A protrusion 26 is formed at one end of the head 22 in the circumferential direction, and a recess 28 corresponding to the protrusion 26 is formed at the other end.

The cylindrical member 20 is made of an iron-based material, and has a ring shape having an inner peripheral surface 20a into which the stator core 14 is press-fitted. One side surface 20b of the cylindrical member 20 protrudes outward, and a plurality of holes 30 for screwing the cylindrical member 20 to a housing or the like (not shown) are formed in the one side surface 20b. The other side 2 of the cylindrical member 20
A predetermined number of protruding pieces 33 having a sensor mounting hole 32 are provided in Oc.

As shown in FIG. 1 and FIG.
0 is an inner circumference 34 of the stator core 14 connected in an annular shape.
And an outer diameter jig 40 disposed on the outer periphery 38 of the cylindrical member 20 to restrict the outer diameter of the cylindrical member 20.

The inner diameter jig 36 is provided with a substantially disk-shaped jig base 42, and a peripheral groove 44 is formed on the jig base 42. An arrangement base 46 for arranging the stator core 14 is fixed to the circumferential groove 44. The arrangement base 46 avoids the guide member 16 of the stator core 14 and
Support 4 A plurality of first jigs 48 are set on the jig table 42 as a whole and can be advanced and retracted in the radial direction, and a second jig 50 is provided on the inner diameter side of the first jig 48. Is disposed, and the second jig 50 is screwed to a substantially central portion of the jig base 42 via a bolt 52. A guide bar 54 is screwed to the jig base 42 at equal angular intervals and concentrically with the second jig 50.

The first jig 48 adopts a structure in which a ring is divided into, for example, nine equal parts. Each first jig 48 moves forward and backward in the radial direction to expand and contract the entire outer diameter. The first jigs 48 that match each other are arranged with a predetermined gap.
Three first jigs 4 arranged corresponding to the guide bars 54
8, an oval 56 is formed to allow the guide bar 54 to pass therethrough and be movable by a predetermined distance in the radial direction. On the inner diameter side of the first jig 48, the first tapered surface 5 that is inclined in a radially outward direction toward the vertically upward direction.
8 are formed, and the stator core 1
An arcuate surface 60 that contacts the inner circumference 34 of 4 is formed.

The second jig 50 has a substantially conical shape.
A second tapered surface 62 that contacts the first tapered surface 58 of the first jig 48 and moves the first jig 48 in the radial direction is formed on the outer side thereof. The second tapered surface 62 is inclined radially outward in the vertical upward direction corresponding to the first tapered surface 58.

The outer diameter jig 40 is set in a substantially cup shape, and restrains the outer periphery 38 of the cylindrical member 20 by its inner peripheral surface 64. Three escape grooves 66 are formed in the side wall of the outer diameter jig 40 to avoid the projecting piece 33 of the cylindrical member 20. The outer diameter jig 40 is provided with a bush 68 for fitting each of the guide bars 54 to guide the outer diameter jig 40 in a horizontal posture, and at the center of the outer diameter jig 40, A pressing surface 72 with which the pressing jig 70 contacts is formed.

A method of assembling the stator 12 using the assembling apparatus 10 configured as described above will be described below.

First, as shown in FIG.
The fourth leg 24 is wound with a conductive wire via the guide member 16, and the coil 18 is provided. This coil 1
The terminal 8 is subjected to terminal processing and the like.

Next, as shown in FIG. 5, the plurality of stator cores 14 provided with the coils 18 are connected in an annular shape. Specifically, the stator cores 14 are connected to each other by fitting the protrusions 26 provided on the head 22 of each stator core 14 into the adjacent recesses 28. The annularly connected stator cores 14 are arranged on the arrangement base 46 of the jig table 42 with the projecting side of the guide member 16 facing downward (see FIG. 6).

In the jig table 42, a plurality of first jigs 48
Are arranged in a ring shape as a whole, and the second jig 50 is inserted into the inner diameter side of the first jig 48. The second jig 50 is provided with the bolts 5 before or after the stator core 14 connected in an annular shape is arranged on the arrangement base 46.
2 is fixed on the jig stand 42 by tightening.

As a result, the second tapered surface 62 of the second jig 50 comes into contact with the first tapered surface 58 of each first jig 48, and under the action of the first and second tapered surfaces 58 and 62, The first jig 48 is pressed radially outward. First jig 4
8 is expanded to a predetermined outer diameter as a whole, and a predetermined gap is formed between each arc surface 60 and the inner circumference 34 of the stator core 14. Then, the cylindrical member 20 is disposed on the stator core 14 connected in an annular shape.
reference).

Next, the outer diameter jig 40 is disposed on the jig table 42, and the guide bar 54 is inserted into the bush 68, and the outer diameter jig 40 is positioned corresponding to the inner diameter jig 36 (FIG. 7). In this state, the pressing jig 70 is
The lower end of the outer diameter jig 40 pushes the cylindrical member 20 downward, and the inner peripheral surface 20a of the cylindrical member 20 has an inner peripheral surface 20a. The plurality of annularly connected stator cores 14 are integrally press-fitted (see FIG. 3).

At this time, the stator core 14 is
a and moves in the radial direction. For this reason,
The inner circumference 34 of the stator core 14 contacts the arc surface 60 of the first jig 48 to restrict the inner diameter of the stator core 14.

After the stator 12 is pressed into the inner peripheral surface 20a of the cylindrical member 20 to obtain the stator 12, the outer diameter jig 40 is raised and the outer diameter jig 40 is
Separate from. Then, as shown in FIG.
0 is fixed to the jig table 42, the bolt 52 is loosened,
After the second jig 50 is removed or loosened from the jig table 42, the stator 12 is taken out of the inner diameter jig 36.

At this time, the first jig 48 is released from the holding action of the second jig 50 and moves in the radial direction, and the inner diameter of the entire stator 12 is slightly reduced. Thus, the work of taking out the stator 12 is easily and smoothly performed.

In this case, in this embodiment, the outer diameter jig 40
Is pressed against the inner diameter jig 36 side so that the inner diameter of the annularly connected stator core 14 is restrained by the first jig 48, while the outer diameter of the cylindrical member 20 is restrained by the outer diameter jig 40. Then, the stator core 14 is integrally press-fitted into the inner peripheral surface 20a of the cylindrical member 20 to obtain the stator 12.

Accordingly, it is possible to reliably prevent the stator core 14 and the cylindrical member 20, which are elastic bodies, each connected in an annular shape, from being deformed during the press-fitting operation.
Thus, the stator 12 obtained by press-fitting the stator core 14 into the cylindrical member 20 can maintain the shape accuracy effectively, and the effect of effectively improving the outer diameter accuracy and the inner diameter accuracy can be obtained.

Further, the stator core 14 is attached to the inner diameter jig 36.
While the cylindrical member 2 is placed on the stator core 14.
The stator 12 can be obtained simply by arranging the outer jig 40 with respect to the inner jig 36 and disposing the outer jig 40. For this reason,
There is an advantage that the assembling work of the stator 12 is easily and smoothly performed, and the working efficiency is improved.

[0031]

In the method and apparatus for assembling a motor stator according to the present invention, the inner diameter of the annularly connected stator core is restricted by the inner diameter jig, while the outer diameter of the cylindrical member is restricted by the outer diameter jig. In this state, the inner diameter jig and the outer diameter jig are relatively closely displaced to obtain a stator. For this reason, it is possible to reliably prevent the stator core and the cylindrical member, each of which is an elastic body, from being deformed during the press-fitting operation, to effectively improve the outer diameter accuracy and the inner diameter accuracy of the stator, and to effectively improve the assembly operation efficiency. Will be possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a motor stator assembling apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic perspective explanatory view of a stator coupled by the assembly device.

FIG. 3 is an explanatory longitudinal sectional view of the assembling apparatus.

FIG. 4 is a perspective explanatory view when a winding is applied to a stator core via a guide member.

FIG. 5 is an explanatory perspective view of a stator core arranged in an annular shape.

FIG. 6 is an explanatory view showing a state where a cylindrical member and the stator core are arranged in the assembling apparatus.

FIG. 7 is an operation explanatory diagram when the stator core is pressed into the cylindrical member by the assembling apparatus.

FIG. 8 is an explanatory view when the press-fitting operation is completed by the assembling apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Assembly apparatus 12 ... Stator 14 ... Stator core 16 ... Guide member 18 ... Coil 20a, 64 ...
Inner peripheral surface 20 ... Cylinder member 34 ... Inner peripheral 36 ... Inner diameter jig 38 ... Outer peripheral 40 ... Outer diameter jig 42 ... Jig stand 48,50 ... Jig 52 ... Bolt 58,62 ... Taper surface 60 ... Circular surface 70 … Pressing jig 72… Pressing surface

Claims (4)

[Claims] 1. A method for assembling a stator for a motor, wherein a plurality of stator cores each having a conductor wire wound thereon are connected to each other in an annular shape, and integrally press-fitted into an inner periphery of a cylindrical member. Arranging the stator core connected to the stator core in an annular shape, arranging a cylindrical member on the outer periphery of the stator core, and relative to the outer diameter jig and the inner diameter jig arranged on the outer periphery of the cylindrical member. By moving in the direction close to
While constraining the inner diameter of the stator core with the inner diameter jig, and constraining the outer diameter of the cylindrical member with the outer diameter jig, the stator core is pressed into the inner periphery of the cylindrical member integrally to mount the stator. A method for assembling a stator for a motor, comprising: 2. The assembling method according to claim 1, wherein the outer diameter of the inner diameter jig is expanded to restrain the inner diameter of the stator core, and after the stator core is integrally pressed into the inner circumference of the cylindrical member. And removing the stator by reducing the outer diameter of the inner diameter jig. 3. A motor stator assembly device for press-fitting a plurality of stator cores, each of which is wound with a conductor wire, integrally into an inner periphery of a cylindrical member in a state where the plurality of stator cores are connected to each other in an annular shape. An inner diameter jig disposed on the inner periphery of the stator core and constraining the inner diameter of the stator core; and an outer diameter jig disposed on the outer periphery of the cylindrical member and constraining the outer diameter of the cylindrical member. Characteristic motor stator assembly equipment. 4. An assembling apparatus according to claim 3, wherein said inner diameter jig is set in a ring shape as a whole.
A plurality of first jigs each having a first tapered surface formed on an inner diameter side thereof and capable of moving back and forth in the radial direction; and a plurality of first jigs arranged on the inner diameter side of the first jig and contacting the first tapered surface. A second jig in which a second taper surface for radially moving the one jig is formed on the outer diameter side.